
This review is dedicated to the scientific career of Prof. Em. Dirk Tourwé.
Abstract
The construction of peptidic amide bonds has become a daily laboratory practice by virtue of well-established ‘coupling reagents’. Nonetheless, inherent limitations connected to these classical coupling methods in terms of waste, safety and expense have yet to be conquered. Research efforts have been devoted to synthetic methods able to surpass these limitations. This short review focuses on the advances made in these ‘non-classical’ methods for amide bond formation with a specific application in peptide chemistry. It consists of two main sections: (i) novel carboxylic activation reagents, and (ii) carboxylic acid and amine surrogates.
1 Introduction
2 Alternative Carboxylic acid Activation Reagents
3 Carboxylic Acid and Amine Surrogates
4 Conclusion and Perspectives
Key words
amides - peptides - amino acids - non-classical peptide couplings - carboxylic acid surrogates - amine surrogates